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- Description
- Specifications
IBM feature #5652 is the Disk/Media Backplane of the IBM Power 770 (9117-MMC and 9117-MMD) and Power 780 (9179-MHC and 9179-MHD). It provides six small form factor (SFF) disk slots and one SATA media slot in the 4U CEC enclosure, and one backplane is part of the minimum feature set of each CEC enclosure. With four connected building blocks, the combined system supports up to four media devices through the Media Enclosure and Backplane #5652.
The six SFF bays take SAS hard disk drives or solid-state drives. The backplane has two integrated SAS controllers under the POWER7 I/O chip and a third embedded controller for the DVD-RAM drive, which lets the DVD be switched between partitions without affecting the assignment of disks. The SATA slimline DVD-RAM drive is the only supported media device: #5762 on the 9117-MMC and 9179-MHC, and #5771 on the 9117-MMD and 9179-MHD.
The bays can run in dual split mode (two sets of three), in triple split mode (three sets of two, with the third set run by SAS adapter #5901 in a PCIe slot), or as one set of six bays with the 175 MB Cache RAID - Dual IOA Enablement card (#5662). That card plugs into the disk/media backplane and enables each embedded RAID adapter to have a 175 MB write cache; RAID 5 needs a minimum of three drives and RAID 6 a minimum of four.
| Feature code | #5652 |
| Description | Disk/Media Backplane |
| Machine types | 9117 (Power 770), 9179 (Power 780) |
| Models | 9117-MMC, 9117-MMD, 9179-MHC, 9179-MHD |
| Disk slots | Six SFF |
| Media slot | One SATA |
| Media device | SATA slimline DVD-RAM (#5762 on MMC and MHC, #5771 on MMD and MHD) |
| Quantity | One per CEC enclosure (minimum feature) |
| Integrated SAS controllers | Two, plus a third for the DVD-RAM drive |
| Split modes | Dual (3/3), triple (2/2/2), single set of six |
| Write cache option | 175 MB with #5662 |
| Third-set adapter in triple split | #5901 |